Join Grant Castleberry as he welcomes Dr. Keith Mathison, theologian, author, and the inaugural R.C. Sproul Chair of Systematic Theology at Reformation Bible College, for a fascinating conversation on the life, legacy, and theological influence of Dr. R.C. Sproul. Dr. Mathison shares his own journey to faith, his years of working alongside Sproul, and the providential path that led him from Texas to Ligonier Ministries and Reformation Bible College.

The conversation explores Sproul's lasting impact on the resurgence of Reformed theology, his remarkable gifts as a teacher and communicator, and his passion for equipping ordinary Christians with sound doctrine. Grant and Keith also take a deep dive into classical apologetics, discussing how Christians can defend the faith with both biblical fidelity and intellectual rigor.

Topics include the existence of God, the authority of Scripture, the role of miracles, the relationship between faith and reason, and how believers can answer the moral and philosophical objections raised by today's culture.

Whether you've benefited from R.C. Sproul's ministry for decades or are just discovering his work, this episode offers a compelling look at one of the most influential theologians of the last century while equipping Christians to confidently proclaim and defend the truth of the gospel.

Watch the interview by visiting our YouTube Channel.

In this episode of the Unashamed Truth Podcast, Grant Castleberry is joined by Dr. John Tweeddale, Vice President and Professor of Theology at Reformation Bible College, to explore the remarkable life and ministry of James Montgomery Boice. Though often overlooked today, Boice helped shape modern Reformed evangelicalism through his unwavering commitment to biblical authority, expository preaching, and confessional theology.

Together they discuss Boice's ministry at Tenth Presbyterian Church, his influence on leaders such as R.C. Sproul, John MacArthur, John Piper, and Tim Keller, his leadership in the Chicago Statement on Biblical Inerrancy, and his role in founding the Philadelphia Conference on Reformed Theology. Along the way, they reflect on Boice's preaching, his passion for mentoring younger pastors, and why his example remains so needed for the church today.

Whether you're a pastor, ministry leader, or simply want to learn from one of the most influential yet underappreciated figures of the twentieth century, this conversation will encourage you to stand firmly on the authority of God's Word and faithfully proclaim Christ to the next generation.

Watch this episode on our YouTube Channel.

What does true repentance really look like? Is repentance simply something that happens at conversion, or is it the pattern of the entire Christian life?

In this episode, Grant Castleberry is joined by theologian and pastor Harrison Perkins to discuss the biblical doctrine of repentance. Together they explore the relationship between repentance and faith, why repentance is a gracious gift rather than a burden, how Christians fight ongoing sin, and why the Reformers and Puritans considered repentance essential to spiritual growth. Drawing from Scripture, church history, and pastoral ministry, this conversation offers practical encouragement for every believer seeking to follow Christ with greater holiness and hope.

Watch the episode by visiting our YouTube Channel.

Why are so many young men returning to church today? In this episode of the Unashamed Truth Podcast, Grant Castleberry examines Paul's powerful exhortation in Titus 2:6: "Urge the younger men to be self-controlled."

What is biblical self-control? Why is it essential for spiritual growth, leadership, and perseverance? And how does the gospel empower believers to overcome temptation and pursue lasting joy in Christ?

Join us as we explore the biblical foundation of self-discipline and why self-control is one of the most important virtues a young man can cultivate.

Be sure to subscribe to our YouTube channel to watch the full episode and access additional biblical resources and content.

In this episode of the Unashamed Truth Podcast, Grant Castleberry sits down with Jonny Ardavanis, pastor of Stonebridge Bible Church and founder of Dial In Ministries. Jonny shares his testimony, his journey into pastoral ministry, and the influences that shaped his life and theology.

Together, they discuss expository preaching, the sovereignty of God, reaching Gen Z with biblical truth, the growing interest in Catholicism among young evangelicals, and why depth, not entertainment, is what the next generation is truly seeking.

If you're passionate about faithful ministry, Reformed theology, and the power of God's Word, this conversation will encourage and challenge you.

To watch this episode, visit our YouTube Channel.

How should Christians think about PTSD, trauma, and mental health?

In this episode, Dr. Grant Castleberry sits down with Dr. Greg Gifford, Associate Professor of Biblical Counseling at The Master's University, to discuss the sufficiency of Scripture for life's deepest struggles.

Drawing from their shared military backgrounds, Grant and Greg explore PTSD, trauma, suffering, mental health, and the vital differences between biblical counseling and modern therapeutic approaches. They discuss how the gospel provides hope for those facing fear, guilt, anxiety, and life's most difficult trials.

If you've ever wondered whether God's Word is truly sufficient to help people navigate trauma and suffering, this conversation is for you.

Resources Mentioned:

• Lies My Therapist Told Me
• Helping Your Family Through PTSD
• Transformed Podcast
• BiblicalCounseling.com

You can watch this episode on our YouTube Channel.

In this timely episode of the Unashamed Truth Podcast, Grant Castleberry sits down with pastor and SBC presidential candidate Willy Rice to discuss the future of the Southern Baptist Convention and the need for spiritual renewal among Southern Baptists.

Together they explore the importance of doctrinal clarity, the role of the Baptist Faith and Message, the debate surrounding the Law Amendment, the influence of cultural pressures on the church, and the challenges facing the SBC today.

Willy shares his personal testimony, pastoral journey, concerns about theological drift, and his vision for a stronger, healthier, and more faithful Southern Baptist Convention. This conversation offers encouragement for pastors, church leaders, and church members who care about biblical conviction, denominational health, and the future of evangelicalism in America.

To watch the interview, visit our YouTube Channel.

What does it mean to be justified before God? Is forgiveness enough, or do believers need something more?

In this episode of the Unashamed Truth Podcast, Grant Castleberry sits down with Dr. Mike Riccardi, Professor of Theology at The Master's Seminary and a pastor at Grace Community Church, for a rich discussion on the doctrine of justification by faith alone. Together they explore why the righteousness of Christ is essential to the gospel, how Christ's perfect obedience is credited to believers, and why this doctrine was so passionately defended by Reformers such as Martin Luther and John Calvin, as well as modern voices like R.C. Sproul and John MacArthur.

Dr. Riccardi explains the biblical foundations of imputation, the difference between Christ's active and passive obedience, and why the believer's assurance rests entirely on the finished work of Christ rather than personal performance. This conversation is both deeply theological and profoundly pastoral, offering comfort and confidence to every Christian struggling with guilt, doubt, or self-righteousness.

In This Episode:

• What justification by faith alone really means
• Why Christ's perfect life matters for your salvation
• The doctrine of imputation explained
• The active and passive obedience of Christ
• Why John MacArthur strongly defended this doctrine
• Modern attacks on justification
• How this truth strengthens assurance and sanctification
• Why believers can rest in Christ's righteousness alone

Listen and be reminded that your acceptance before God rests entirely on the righteousness of Christ credited to you by faith.